Heavy-atom effect on decay dynamics of triplet-state ion pairs. Chloranil-naphthalene (1:2) termolecular systems.
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概要
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Decay kinetics of triplet-state ion pairs (<SUP>3</SUP>IPs) have been studied for the termolecular systems consisting of the chloranil anion radical (CA<SUP>\newdot</SUP>) with the dimer cation radical of naphthalene (Np<SUP>\underset.+</SUP>) or its monohalogenated derivatives (NpX<SUB>2</SUB><SUP>\underset.+</SUP>) in 1,2-dichloroethane by means of laser photolysis. Marked heavy-atom (HA) effect was found on back electron transfer (back ET) but not on ionic dissociation (ID). A small effect of 1- or 2-brominated compound on <SUP>3</SUP>IP lifetimes was observed. Both back ET and ID processes of <SUP>3</SUP>(CA<SUP>\newdot</SUP>, Np<SUB>2</SUB><SUP>\underset.+</SUP>) were found to be almost temperature-independent. Electron-transfer (ET) quenching of <SUP>3</SUP>CA leading to produce the (1:1) <SUP>3</SUP>IP was also independent on the HA substitution. For these kinetic studies, a conventional decay analysis was examined.
- 公益社団法人 日本化学会の論文
著者
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Shizuka Haruo
Deparment Of Chemistry Faculty Of Engineering Gunma University
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Kobashi Harumichi
Department of Chemistry, Faculty of Engineering Gunma University
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Suto Hiroshi
Department of Chemistry, Faculty of Engineering, Gunma University
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